Heat interchanger of the plate type



March 19, 1929. e. M. 6. DE BEAUVAIS 1,705,471

. HEAT INTERCHANGER OF THE PLATE TYPE Filed June 12, 1924 Inventor Georges/fade 6?)" [Me 612 BeauvdZ s 7 I flffiorne;

Patented Mar. 19, 1929.

UNITED STATES GEORGES MARIE GEROUILLE 1m BEAUvAIs or PARIS, GEORGES JULES PRAT, or rams, FRANCE.

FRANCE, ASSIGNOR TO HEAT INTERCHANGER OF THE PLATE TYPE.

Application filed June 12, 1924,

The present invention relates to heat interchangers or air heaters of the plate type and especially those of this type for the heating of air by combustion gases. Its object, in particular, is to render such apparatuses, whatever their construction, more simple and therefore more economical.

The invention consists in an interchanger characterized by the employment of clips of .U-shape, preferably embracing the adjoining borders of the constituent elements of a cell and preferably efi'ecting elastically and without the aid of any tie, rivet, spring or solder, the desired interconnection of the borders of the elements. The invention includes various constructional forms of this method of interconnection; it includes also modifications to be applied to suitable interchangers of the plate type in order to permit the employment of the connecting pieces.

Various contrivanees according to the inventionare illustrated, by way of example,

on the accompanying drawings in which Fig. 1 is a perspective view of two adjoining cells of the interchanger, these cells being ready to receive their assembly pieces;

Fig. 2 is a perspective view of a series of cells interconnected by their connecting pieces;

Fig. 3 is a transverse section of the joint between two elements of a cell, taken along the line 3-3 of Fig. 2;

Figs. 4 and 5 are respectively anclevation and a perspective view of a heat intcrchanger constituted by cells according to Figs. 1 to 3. (Part of the joint covering is assumed to have been removed in Fig. 4.)

Figure 6 is a vertical section of an interchanger or air heater as mounted in the flue of the. chimney and is taken on the line 66 of Figure 7.

Figure 7 is a section of Figure 6.

In order to construct the heat inter-changer illustrated in Figs. 1 to 5, plates 1 of square or rectangular shape are disposed parallel to each other and such plates are separated by channel bars 2 of U transverse section. the flanges of which are applied to the opposed borders of the plates, the disposition of the taken on the line 7-7 Seria1-No. 719,573, and in Belgium June 18, 1923.

channel bars being variable according to the direction of the circulation desired to be imparted to the fluids. Assuming that flows perpendicular to each other are required, the channel bars 2 are placed horizontal and the, adjacent bars 2 vertical, so as to form cells 3, 4.

A clip 5 of U transverse section (Figs. 2 and 3) is engaged over the border of each plate or sheet 1 and the corresponding flange c0 of the channel bar 2 2 The flanges of such clip thus clamp these two elements against one another elastically, the pressure of the flanges of the clip being proportionate to the forces tending to separate the constituent elements of the cell. The member 5 thus acts as a clip the limbs of which separate slightly when the member embraces the adjacent edges of the channel bar 2 and of the frame plate 1.

To construct an air heater or heat interchanger by the aid of the cells and groups of cells shown in Figs. 1 to 3, they are arranged against one another in series (Figs. 4 and 5) and are fitted for example between two frames 6 and 7 interconnected by cross ties 9.

The above described interchanger can beemployed, as indicated in Figs. 6 and 7, to effect the transmission of heat between air and combustion gases.

The interchanger is supported by its frames 6, 7 with cross ties 9 in a smoke flue 10 which opens into a chimney 11; the burnt gases in this flue 10 traverse from beneath to above in the direction of the arrows 12 the cells 4 open at their bases and tops. The cold atmospheric air enters laterally the chambers 3 in the direction of the arrows 13 and leaves the interchanger by a conduit 14 conducting this air to the furnace; a fan 15 ensures this circulation of air.

The invention extends not only to the above described contrivanees, but also to all variations which can be made in these contrivanees 'by modifying for instance the shape of the sheets, the form of the means separating such sheets from one another, etc.

Claim:

A heat i nterchanger comprising a plurality of smooth and parallel plates, channeled irons inserted between successive plates and assembly without the aid of any clamping or keeping them spaced from each other so as Welding, a framefor eceiving the assembled to form two sets of alternating cells, riders Q means f dmg h 1 1' I the 10 fitted on the smooth edges of the smooth first set f cells, and means for leadmg the 5 plates and of the channeled irons, the said hot gases, mt the Second of 091153 riders elastically exerting the desired ten- In testlmony whereof I fi y slgnaturesion between said edges so as to insure their GEORGES MARIE dc BEN-WAIS- 

